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There are different types of energy. In this case, the energy apart from radiant heat is giving off energy in the visible range, ~400-800 nm wavelength. That's why you can see it.
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∙ 12y ago
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What are luminescent objects?
A luminous object is something that emits/gives off light - eg sun, star, light bulb, A non-luminous object is something that doesnt have/give off its own light - eg moon, diamond, wood. Non-luminous objects can only be seen because they reflect light, which is given off by luminous objects.
What type of object can be seen in darkness and why?
luminous objects allows to absorb ans emits light.
Is fire a type of radiation energy?
Yes, the bright flame as we seen is the radiation itself.
Why is shadow not seen in darkroom?
it is because there is no source of light.
Why is the light of a lighthouse seen many miles out at sea?
Because that's what it's supposed to do.
Is the candle flame that is seen luminous?
yes
Why is a candle flame seen?
A candle flame is seen because it consists of glowing gases.
Why is the flame known as luminous flame?
It is bright, and could not be seen clearly as it emits light
What is the purpose of comparing Luminous and non luminous flames?
luminous flames are those which throw or Emmit bright light of great intensity......but non luminous flames are those which just glow and do not emmit light of such great intensity................ it should not be misunderstood with candle ......and coal........as one emits flame and the other does knot's as there is no flame......there is no point of luminous or non luminous
Which confirmatory test is for sodium?
Its Flame Test:it gives golden yellow colour to non luminous flame which is not seen through a blue glass.
Why is it advisable to put off a non luminous flame when not in use?
Non- Luminous can burn efficiently because luminous flames don't burn as efficiently as non-luminous ones, they don't produce as much energy. This means that the non-luminous flames have a lot more energy than luminous ones, and their flames are actually hotter. This is why the luminous ones look yellow and the non-luminous ones look blue. Hotter flames burn blue and (relatively) cooler ones burn yellow.
What happens during a melting candle?
when a candle is lighted ; this is what happens : the solid wax melts and rises up the wick. The wax vapours react with oxygen to burn as a flame. The candle starts melting. This is a physical change. while observing the candle flame we see that the candle has 3 zones. Non - Luminous zone is the innermost zone. It appears as a dark zone and is the coldest part of the candle flame due to less oxygen. Then comes the Luminous zone , it is yellow and opaque. The glowing of carbon particles cause the flame to look yellow and emit light. Then , Invisible zone - it is the outermost zone of the candle flame. it is the hottest zone and cannot be seen with naked eye. Combustion reaction comes to completion here and carbon changes into carbon dioxide.
Is a candle flame seen because it is luminious?
A candle flame is seen because the carbon hydrogen bonds in paraffin are being broken and energy is released as photons. The photons activate the photoreceptors in your retina to form an "image", then that image travels to the back of the brain through the optic nerve to be interpreted. The carbon and hydrogen atoms form new bonds with oxygen with their electrons in a lower energy state(as carbon dioxide and water).
Do hot plates need to be plugged in?
Some hot plates are heated pureley by candle flame heat located underneath.Whilst I have seen flame heated I have also seen electric heated hot plated which can have to be plugged in whilst some re charge it depends on your make model and brand.
Is Mars luminous?
For the most part, no, Mars is not luminous. However, at certain angles, it can reflect light from the sun and be seen.
What is the difference between a planet and a star with regard to the light in space?
A star generates energy, including light, which it emits into space, i.e. it is luminous. A planet can only be seen because it reflects the Sun's light, i.e. it is non-luminous.
What non luminous objects can be seen in the dark?
please help me on this one
